Hi @Bram!
First of all, let me welcome you to our community! Feel free to Introduce yourself 🙆 to all the members if you feel like it!
As for the error message, I’m suspect this is some sort of install issue/mismatch.
Do you have any other connectors installed? If so, which ones and on which version?
Did you have any software open while doing the upgrade to 2.2.9-beta.
Anyway, thanks for reporting this! I’ll have a look and see if I can reproduce on my end.